Davit arm
The davit arm is a welded construction of a hollow section, a pipe, steel plates and a flange and provided with all relevant accessories such as winch foundation, starter box, top sheave and lifting eye.

Flange/Pedestal
Dependant on the size of the davit, the SCHD series will be delivered either with an intermediate flange or with a pedestal.
The intermediate flange should be bolted onto a counter foundation whilst the execution with a pedestal should be welded on deck.

Slewing ring
The slewing ring of the SCHD series consists of an inner-ring, an outer-ring and a single row ball bearing. The slewing ring is fastened to the davit arm and the flange/pedestal by means of high strength structural bolts and nuts.
Dependent on the size of the davit either the inner-ring or the outer-ring is driven by one or two hydraulic slewing drives.

Winch
Each davit will be supplied with an electric driven winch built onto the davit arm.
The winch is a standard item and consists of the following main components:
Closed gear casing;
Built-on electric motor;
Single winch drum with separate section for remote control wire;
Speed reducer gear (conventional gear train);
Centrifugal brake unit for gravity lowering;
Stop brake of the “dead-man” type;
Manual cranking gear with safety device.

Hydraulic power pack unit
The hydraulic power pack consists of the following main components:
Hydraulic tank with drain valve;
Hydraulic pump;
Electric motor;
Pressure switches;
Pressure relief valve;
Control valve;
Accumulators (2 x).

Accessories:
Each davit system will be supplied with the following accessories:

Electric controls
Motor starter built onto the davit arm and provided with main switch, push button and “power on” indicator;
Limit switch.

Wire rope
Galvanised non-rotating steel wire rope provided with thimble at one end and of sufficient length for lowering the rescue boat into the water;

Remote control parts
Stainless steel remote control wires of sufficient length for both slewing and lowering;
Handgrips for operating from within the rescue boat;
Remote control sheaves;
Loose items such as wire rope clips and shackles;

Conservation
Unless agreed otherwise, all steelwork will be shot blasted to SA 2,5 and coated with one layer of 2-component epoxy primer of brand SIGMA. Dry film thickness 60-80 microns.
This conservation is not suitable for outdoor storage for a long period of time.

Optional accessories
The following accessories are to be seen as non-standard but can be supplied optionally:
Stainless steel automatic release hook (off-load type);
Counter foundation/Pedestal;
Cradle for rescue boat